Spalted Box Elder burl Vase with epoxy highlights and accents.  The inside of this vase has been sealed with epoxy so you can put water in it to keep fresh cut flowers in it. 

A burl (American English) or burr (British English) is a tree growth in which the grain has grown in a deformed manner. It is commonly found in the form of a rounded outgrowth on a tree trunk or branch that is filled with small knots from dormant buds. Burl formation is typically a result of some form of stress such as an injury or a viral or fungal infection.